Notifications refactor (#5151

* Ongoing

* refactor

* test

* Add cleanup task

* refactor

server/queues/tasks/CollectionCreatedNotificationsTask.ts

@@ -0,0 +1,44 @@
+import { NotificationEventType } from "@shared/types";
+import { Collection, Notification } from "@server/models";
+import NotificationHelper from "@server/models/helpers/NotificationHelper";
+import { CollectionEvent } from "@server/types";
+import BaseTask, { TaskPriority } from "./BaseTask";
+
+export default class CollectionCreatedNotificationsTask extends BaseTask<
+  CollectionEvent
+> {
+  public async perform(event: CollectionEvent) {
+    const collection = await Collection.findByPk(event.collectionId);
+
+    // We only send notifications for collections visible to the entire team
+    if (!collection || !collection.permission) {
+      return;
+    }
+
+    const recipients = await NotificationHelper.getCollectionNotificationRecipients(
+      collection,
+      NotificationEventType.CreateCollection
+    );
+
+    for (const recipient of recipients) {
+      // Suppress notifications for suspended users
+      if (recipient.isSuspended || !recipient.email) {
+        continue;
+      }
+
+      await Notification.create({
+        event: NotificationEventType.CreateCollection,
+        userId: recipient.id,
+        collectionId: collection.id,
+        actorId: collection.createdById,
+        teamId: collection.teamId,
+      });
+    }
+  }
+
+  public get options() {
+    return {
+      priority: TaskPriority.Background,
+    };
+  }
+}